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具有高容量和长寿命的水性Zn-SPAN电池与并联催化

Hong Li^1,2, Mengtian Zhang¹, Zhiyang Zheng¹

¹Tsinghua-Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.

Advanced materials (Deerfield Beach, Fla.)

|December 11, 2024

概括

水性硫电池通过在硫化聚烯 (SPAN) 电池中使用一种新的双联催化系统来克服聚硫化物溶解. 这增强了能量储存,提高了容量和稳定性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

水性硫电池具有高容量和成本效益.
在转换过程中聚硫化物溶解会阻碍电池的性能.

研究的目的:

开发高性能水性可充电 Zn-硫化多烯 (SPAN) 电池.
为了解决多硫化物溶解,使用配合添加剂的双重催化系统.

主要方法:

使用水/四聚 (G4) / (I2) 系统制造水性可充电Zn-SPAN电池.
机制研究,以了解聚硫化物形成和缓解.
电化学测试用于评估电池性能,包括容量,速率能力和循环稳定性.

主要成果:

开发的系统通过完全结合的分子配置来规避可溶性聚硫化物形成.
实现了H+/Zn2+与多个氧化还原中心的可逆共存储.
双重催化剂稳定了Zn阳极,形成了有机-无机相间.
显示了高容量 (1260.4 mAh g-1 在0.2 A g-1),优异的速率性能 (409.3 mAh g-1 在5 A g-1),以及长周期稳定性 (81.8%保留超过800个周期).

结论:

双联催化系统有效地抑制了多硫化物在水性Zn-S电池中的溶解.
该研究在用于高性能水性离子电池的有机硫化合物方面取得了重大进展.
这种方法可以实现多电子传输,以获得增强的能量存储解决方案.

关键词:

H+/Zn2+ 联合储存水性离子电池水性离子电池多个电子的转移转移.硫化聚烯二二烯的硫化聚烯二双联催化系统是一种催化系统.

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